EMC1188 Datasheet, PDF (29/48 Pages) Microchip Technology – Notebook Computers

Quad Channel 1°C Temperature Sensor with Hardware Thermal Shutdown and 1.8V SMBus Communications
Datasheet
Table 6.2 Temperature Data Registers (continued)
ADDR R/W
REGISTER
B7
B6
B5 B4 B3 B2 B1 B0 DEFAULT
2Ah
R
External Diode
3 High Byte
128
64
32 16 8
4
2
1
00h
2Bh
R
External Diode
3 Low Byte
0.5
0.25 0.125
-
-
-
-
-
00h
As shown in Table 6.2, all temperatures are stored as an 11-bit value with the high byte representing
the integer value and the low byte representing the fractional value left justified to occupy the MSBits.
6.3
Status Register 02h
ADDR
02h
Table 6.3 Status Register
R/W REGISTER B7
B6
R
Status BUSY -
B5
B4
B3
B2
B1
B0
DEFAULT
-
HIGH LOW FAULT THERM HWSD
00h
The Status Register reports general error conditions. To identify specific channels, refer to Section 6.9,
Section 6.16, Section 6.17, and Section 6.18. The individual Status Register bits are cleared when the
appropriate High Limit, Low Limit, or Therm Limit register has been read or cleared.
Bit 7 - BUSY - This bit indicates that the ADC is currently converting. This bit does not cause either
the ALERT or THERM pin to be asserted.
Bit 4 - HIGH - This bit is set when any of the temperature channels exceeds its programmed high limit.
See the High Limit Status Register for specific channel information (Section 6.16). When set, this bit
will assert the ALERT pin.
Bit 3 - LOW - This bit is set when any of the temperature channels drops below its programmed low
limit. See the Low Limit Status Register for specific channel information (Section 6.17). When set, this
bit will assert the ALERT pin.
Bit 2 - FAULT - This bit is asserted when a diode fault is detected on any of the external diode
channels. See the External Diode Fault Register for specific channel information (Section 6.9). When
set, this bit will assert the ALERT pin.
Bit 1 - THERM - This bit is set when the any of the temperature channels exceeds its programmed
Therm Limit. See the Therm Limit Status Register for specific channel information (Section 6.18).
When set, this bit will assert the THERM pin.
SMSC EMC1188
29
DATASHEET
Revision 1.0 (07-11-13)